Analysis of the variability in miRNA expression between biological replicates.

<p>Hierarchical clustering of a subset of miRNAs that were identified as being differentially expressed between the epithelial cells from the caput/corpus, corpus/cauda, and caput/cauda was performed to assess overall variability between biological replicates. Cells within the matrix depict the relative expression level of a single miRNA within the 9 (caput/corpus)—12 (cauda) biological samples represented in each replicate. Yellow and blue shading represents the expression level (log₂ fold change) above and below the median for this miRNA in all epithelial samples (caput, corpus, and cauda) analyzed, respectively.